Another rule to add:
17) Spoilers should be colored to the backdrop.
In more detailed terms: spoilers are anything which could reveal a plot twist, a major event, etc. of a series. They are called "spoilers" because they can spoil that series for another person. No one wants to know "Major Character X dies" before they watch that episode.
Coloring out is a little tricky.
To color out some text, use the color tags. These are:
(color=red)TEXT(/color)
but replace the ( and ) with [ and ]. The backdrop on TPM is one of two colors. If your post is on a lighter background, replace "red" with "#333333". If your post is on a darker background, replace "red" with "#232323". (Quotes are a third color, I think it's #101010 but I'm not completely sure). Whatever you're typing, obviously, goes where I put "TEXT". This produces something like this:
This is a spoiler. Note how it can't be seen without highlighting the text.
This creates a post that you have the highlight, and know that you're getting the spoilers, instead of accidently reading it in passing.
PLEASE NOTE: Any topic with a title containing "Spoilers" likely will have spoilers contained within. While it is highly recommended that spoiler colors are used, a topic devoted to the end of one series is not required to use tags (if you wish to create a topic like this, please mark it as such in the title). Mods will try to regulate tags in topics like "What have you watched this week?", but please be aware that they may contain normal-text spoilers.
EDIT:
OK, so we're back to the old boards. This means spoiler tags-
(spoiler)TEXT GOES HERE(/spoiler)
Only [], not ()
- now work again. These you only need to hover over...
(Spoiler:) Example says hi.
If you want to stick to the good old color tags, the background will now ALWAYS be #232323.